Turret-lathe



(No Modem 2 Sheets-Sheet 1.

H. DRYSDALE. TURRET LATHE.

No. 493,019. Patented Maw, 1893.

Ulmm

ATENT OFFICE.

HUGH DRYSDALE, OF CLEVELAND, OHIO.

TU RRET-LATH E.

SPECIFICATION forming part of Letters Patent No. 493,019,

dated March 7, 1893.

Application filed October 23, 1890. Serial No. 369,148- (No model.)

To all whom it may concern.-

Be it known that I, HUGH DRYSDALE, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented a new and useful Cam- Turning Attachment to Turret Lathes, ofwhich the following is a specification.

My invention relates to improvements in turret-lathes, in which arevolving spindle carrying a chuck, holding the work operates inconjunction with a transverse cut-off carriage, and a rotating turret,supplied with cutting tools; and the object of my improvement is, toprovide certain attachments to the spindle and framework of a metalturning turret-lathe, by means of which cams; elliptical, polygonal,heart-shaped and other analogous forms of irregular shape, may bereadily turned in such lathe. I attain this object by the mechanism setforth in the accompanying drawings, in which- Figure 1 is a longitudinalperspective view of the entire machine. Fig. 2 is a plan view of theparts comprising the invention. Fig. 3 is a longitudinal perspectiveview of the vise-j awed chuck adapted to my improvement. Figs. 4, 5, and6 are plan views of a former or pattern. Fig. 7 is a longitudinalperspective View of a tool-body. Fig. 8 is a detailed view inperspective of the slide-carriage, and toolblock detached.

Similarletters referto similar parts throughout the several views.

The main frame B, itslegs A, A, head-stock 'O, cone and spindle O,vise-jawed chuck E, transverse elevation block F, and cut-off carriageand tool-body rest G, a slide-carriage elevation block H, hand-wheel I,slide-carriage J, turret K, and tool-body L constitute a turret-lathe.In the head-stock O, revolves the cone and spindle O, carrying avise-jawed chuck E, the face and jaws of which are shouldered as at y,(see Fig. 3,) and is supplied with a correspondingly recessed disk I),secured by screws it, through said disk into the screw holes 113, in thebody of said chuck E in a manner not to interfere with the opening andclosing of the vise-jaws o, by the operation of the screw .2. Said diskI), secured to the chuck E as described, is revolved with the spindle Oand has cut or ground in its circumference a form or face 19 (see Figs.4, 5, and 6,)

that is a pattern of a cam, elliptical, (see Fig. 4,) polygonal, (seeFig. 5,) heart-shaped, (see Fig. 6,) or other analogous forms ofirregular shape; each distinct form of irregular shape, is cut or groundupon a separate disk, adaptable to said shouldered chuck, and is usedindividually and serves as a pattern or shape of the work to be turned,and also serves as an actuating cam, that makes contact connection ofsaid face b with an antifriction roller e, engaging a slide-carriage d.On the tool-body L in the turret K, is provided a slide-carriage d,transversely mounted in dovetailed slide-ways 0 and has arranged on itstop a fixed dovetailed guide-way h, which serves to guide acorrespondingly recessed base-plate of the tool-block f, a view inperspective of said slide-carriage d, and tool-block f, detached fromeach other is shown in Fig. 8. On the inner end of said slide-carriaged,

is provided an upright extension 5', having fixed in its top a pin orstud f, that engages the cable Z, suspending a weight m, over a groovedpulley is loose in the bracket 45, that is secured to the main-frame Bbyscrews it.

To the side of the tool-body L, (see Fig. 7,) is permanently securedalaterally-projecting rod i that extends through a hole in the downwardextension 5 of the slide-carriage d, and is encircled with a spiralspring 6 between said downward extension .5 and side of tool-body L,referred to hereinafter. On the opposite end of said slide-carriage d isprovided an upright extension 00, having a laterally-projecting" stud 6which is secured by a shoulder-extension c and draw-nut 10, in saidextension a: carrying an anti-friction roller 6, that forms thecontact-connection of said slide-carriage d, to the pattern and cam-faceb aforementioned. The revolving of said pattern and cam 12 by thespindle 0, moves transversely said slide-carriage at through a space onthe tool-body L equal to the cam-development given to the pattern-face12 Which slide carriage is drawn back in the, opposite direction by thesuspended weight on, and the tension of the spiral springi previouslyreferred to. Said mentioned weight m and spiralspring 1' can be usedindividually, to operate transversely said slide-carriage d, in thedirection opposite to that caused by the rotation of the pattern andcamb, aforementioned.

Thus is the slide-carriage d transversely reciprocated on the tool-bodyL, which is moved lengthwise of the machine on the rest G, inconjunction with said transverse reciprocation by the hand-wl1eel I,which governs the extent in length, of the forms of irregular shape tobe turned. The tool-block f, aforementioned is shown in perspective viewin Fig.8, and has atransversely arranged groove 0 in its top, a knife nin said groove, with a screw 0 in said block to adjust forward, saidknife, in said groove, as it is worn or ground away. The knife hasacutting-edge on its projecting end,with which to turn the cam, of anelliptical, polygonal, or heart-shape, or other faces of irregularshape, corresponding to the pattern-face 71 A similar groove, knife, andadjusting screw are longitudinally arranged on said tool-blockf, theknife havinga cuttingedge on its projecting end, with which to turncam-hollows, collars, 850., similar in shape to the pattern-face b theknives to be used individ ually are secured in their respective groove 0by means of a cap-piece n, and set-screw n Said tool-block f has a slotf vertically through its body, a cap-piece f extending over the sides ofsaid slot, a screw f projecting through said cap and slot, into acorrespondingly threaded hole in the slide-way 7!, which firmly retainssaid tool-block f, to the slide-carriage (Z when in use. The tool-blockf is moved, to or from the bar-metal, on the slide-way h, by releasingthe screw f 4 and operating the screw n that is threaded through theupright extension 8' and engages said tool-block on said slide-way h tothe extent of" the slot f when not in use. Said toolblock is mademovable on said slide-way, as described, so that forms or hollows,inshape similar to the pattern-face b can be turned of various diameters,by the sameor'adiiferent'pattern-face b by moving said block to or fromthe bar-metal. The weight m when disconnected from said slide carriage drests upon a stand 92, that is provided with a downward extension q,projecting into the hollow of an upright piece 0, and rests upon the endof a foot-lever 0'', that is fulcrumed as at 8, (see Fig. 1,) in theupright piece j; and the stand a is raised or lowered by the foot-leverr, as it is desired by the operator to couple, or uncouple the weight717., by its engaged cable Z, to or from the pin f on the slide-carriagecl, aforementioned. Said pieces 0' and j, each have one end flanged asat '19, and are secured to the floor w in a vertical position with thepulley 70, by screws m,- the piece 0 serving as a vertical-guide way forsaid stand 71, to support said weight 'm, as described.

The operation of the machine isas follows: The tool-body L is movedforward on the rest G by the hand-wheel I, which brings the antifrictionroller e of the slide-carriage d in contact with the pattern-face of therespective disk I) in use; that is revolved by the spindle O,andreciprocates transversely in one direction on the tool-body L, saidslide-carriage cl and its tool-blocks f, which are drawn back in theopposite direction by the tension of said mentioned spiral spring 2'orsuspended weight m and connections; the respective knife 72 in usemeanwhile, imparting to the bar metal, that is held in the chuck E, aface or hollow that is an exact counterpart of the pattern-face b inuse, and said knife is fed lengthwise of the bar-metal the requiredlength, by the hand-Wheel I; the roller e gliding on the pattern-face F1The form or hollow being turned thus, the weight-stand n, is raised upby the foot on the lever at 'r and lifts said weight up so that thecableZcan be disconnected from the pin f on the slidecarriage d, whichis drawn back and turned about the turret K by the wheel I, so that eachform or hollow produced may be operated upon by any other desired toolsinthe turret before cutting the same from the barmetal; and this cuttingisdone by meansof a cut-off knife a secured in" a'block ontheslide-plate a, that is slidably mounted in transverse slide-ways on thetool-body L, and istransverscly operated by means'of the handle 0'attached to the top of astud 0*, that has a cam extension on its lowerend located under the cap-piece a, and engages said slide-plate.Themann'erofcuttingsaidforms from the stock as described forms nopart'of my invention; but

WVhatI do claim as my invention, and de sire to secure by LettersPatent, is

1. The combination in a turret-lathe of a slidecarriage (Z, supportedtransversely of the machine bed, a turret tool-body L, a movabletool-blockf, suitable cutting knives n 'n' adjusting screw 72, lateralprojecting stud c and antifriction roller c, with a canr-disk b, on thelathe spindle actuating said carriage in one direction, and a weight m,and connections tending to move said carriage in the opposite direction,and to hold the same in contact with the cam-face su'bstantiallyasdescribed, whereby when the lathe spindle is rotated said carriage andtools are moved crosswise of the lathe-bed.

2. I11 a turret-lathe having a slide-carriage (Z, supported transverselyof the machinebed, a turret tool-body L, a cam-disk b, on-thelathe-spindle actuating said carriage in one direction, and a weight m,andconnections tending to move said carriage in the opposite direction,in combination with 'a weightstand q, having a hollowupright piece 0", atable a, and afoot-lever 7", fulcrum-ed and supporting said standsubstantially as described, whereby when the lever is pushed down by thefoot, the standis raised lifting the weight to be coupledor uncoupledfrom the slide-carriage.

In testimony whereofI sign this specificaation in the presence of twowitnesses.

HUGH DRYSDALE.

Witnesses:

N. ANDERSON, GHAs. SHIRK.

